Volume 106
Verdcourt, B.,1962. Preliminary keys for the identification of the species of the genus Gulella Pfr. Annales du Musée royal du Congo belge, Tervuren (Belgique), Serie 8, Sciences Zoologiques, Volume 106, 39 pp.
Verdcourt, B.,1962. Preliminary keys for the identification of the species of the genus Gulella Pfr. Annales du Musée royal du Congo belge, Tervuren (Belgique), Serie 8, Sciences Zoologiques, Volume 106, 39 pp.